Struct CoeffBlock 

pub struct CoeffBlock {
    pub quant: [i32; 1024],
    pub eob: usize,
    pub cul_level: u8,
    pub dc_category: u8,
    pub tx_type: TxType,
}

The result of decoding one transform block’s coefficients.

Fields

quant: [i32; 1024]

Quant[] in the coded block’s raster order: signed dequantiser input levels. Only the first Tx_Width * Tx_Height (of the adjusted size) are meaningful; the tail stays zero.

eob: usize

The end-of-block position: the count of leading scan coefficients.

cul_level: u8

culLevel, clamped to 63: the neighbour level context this block leaves.

dc_category: u8

dcCategory: 0 none, 1 negative DC, 2 positive DC.

tx_type: TxType

The resolved PlaneTxType (compute_tx_type, §5.11.40): DCT_DCT for a skipped or lossless block, otherwise the type read/derived here. The dequantiser and inverse transform need it, so it travels with the block.